EP0489891B1 - Verfahren zum abdichten und innenausbessern von systemen verlegter leitungen - Google Patents

Verfahren zum abdichten und innenausbessern von systemen verlegter leitungen Download PDF

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Publication number
EP0489891B1
EP0489891B1 EP91912245A EP91912245A EP0489891B1 EP 0489891 B1 EP0489891 B1 EP 0489891B1 EP 91912245 A EP91912245 A EP 91912245A EP 91912245 A EP91912245 A EP 91912245A EP 0489891 B1 EP0489891 B1 EP 0489891B1
Authority
EP
European Patent Office
Prior art keywords
water
duct
line
pipe
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91912245A
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German (de)
English (en)
French (fr)
Other versions
EP0489891A1 (de
Inventor
Werner Näf
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Individual
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Individual
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Publication of EP0489891A1 publication Critical patent/EP0489891A1/de
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Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/12—Materials for stopping leaks, e.g. in radiators, in tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/164—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe

Definitions

  • the presently described invention relates to a method for sealing and internally repairing systems of installed lines with a small inside diameter, in which the sealing is carried out by damaging the leaks by means of an insertion sealant and the internally being improved by abrasively blowing out and re-coating the line with resin material.
  • Such lines are, for example, inlet and outlet lines for water or gas in residential, industrial and municipal systems up to a 0 ⁇ i of about 200 mm; this includes household and industrial sewage pipes up to the collecting pipe.
  • the leaks in the line section can be determined by determining the pressure drop therein, by means of duct thermography or by means of duct TV.
  • the powdery, dry sealant is poured into a line attachment, which is connected to the inlet of the line section, and the agent is either injected into the line with compressed air and blown while maintaining a pressure difference of> 1 bar between inlet and outlet.
  • the water vapor can be fed into the compressed air line by means of an injector and the steam / air mixture flows through the line part to be repaired until the steam emerges at the end of the line.
  • the finely divided inert agent is stirred into water and the mixture is continuously injected through the line while maintaining a pressure drop of> 0.1 bar.
  • the air pressed through the line can be continuously loaded with the abrasive agent; at the line outlet, the abrasive and the removed covering material are filtered out of the air.
  • a device which, in addition to a mobile air compressor system, a device for loading the compressed air with abrasives, a system for mixing and, if appropriate, for conveying the resin compositions and an end separator for sand and resin drops, a compressed air distribution device with air supply line and air outlet lines, the lines including Carry valves and pressure gauges.
  • the device mentioned can have a programmable measuring, calculation and regulation system for the automated implementation of the blow-out and resin introduction phases after the floors have been determined, after the connections have been made and after the necessary characteristic values have been entered.
  • the corresponding device for carrying out the sealing and interior repair process by means of water flow includes, in addition to the usual supply and discharge lines, auxiliary devices, etc., a pressurized water supply, a silo for receiving and continuously dispensing the finely divided inert materials, an addition and mixing section, a supply line for the mixture with measuring devices to the line to be repaired, an outlet line with a collecting strainer or separator and any return line for the water.
  • the line was pre-dried with compressed air from a compressor.
  • the compressed air was pre-dried in a moisture separator before entering the line.
  • the total length of the line was approximately 80 m; it mainly consisted of 1 1 / 2 ⁇ and 2 ⁇ tubes.
  • the pipeline was partly walled in and partly laid under the ground outdoors.
  • Predrying took about 40 minutes.
  • a special separator was installed at the line outlet; the fine solid that escaped (apparently mainly limescale and rust) came into a special separator.
  • An addition device for the abrasive dry normal sand from 2 to 4 mm with the addition of waste corundum of 1 - 2 mm grain size
  • a separator with a cyclone separator with pressure gauge and regulating valve was installed at the air outlet. It was then worked for about 12 minutes at an average excess pressure of about 1.2 bar with the highest compressor output and the addition of abrasive. After blowing, about 300 kg of sand had been blown through the line to be cleaned. At the end of blowing, the air showed a temperature of ⁇ 60 ° C when it emerged from the separator.
  • the mixture was then blown through again for 30 minutes and the line was closed at the top and bottom at the end of the blowing time.
  • a pool filling took about 9 hours after cleaning the pipe and gave clear water; before filling, it took 14 hours to fill and the water had been colored rust red at times.
  • This line section was sealed at the two entry points into the single family house and at the exit point (i.e. at the entry into the collecting line, which point was exposed due to a new building) to a compressed air distribution device connected to the mobile compressor as shown in FIG. 3. It was thus found that an overpressure of approx. 0.2 bar could not be maintained in the line part (confirmation of the leak and at the same time marking it as gas-permeable).
  • the mixture was blown into the line to be renewed using compressed air. It was found that by slightly opening the closures at the two entry points, blowing in the sealant was easier (p ⁇ 1 bar overpressure). This blowing process was repeated four times.
  • the inventors / applicants have installed a simple system for further perfecting the method according to the invention, especially the sealing technology (see FIG. 6).
  • the container 6.1 for example a barrel
  • bottom outlet 6.02 three layers are filled: 6.04 fine sand (0 ( A to 2 mm) and 6.06 gravel (0 ⁇ A 10 to 20 mm).
  • test tube 6.2 When filling the gravel layer 6.06, the test tube 6.2 is installed in the layer, the horizontal part 6.16 of which comes to lie approximately in the middle of the gravel layer. Then it is filled up.
  • this "horizontal" part is not always horizontal, it can also contain a 90 ° bend that runs up / down or to the left / right.
  • dispersion powders such as EMU R powder 120 FD (BASF), Mowilith R powder DM R 200 P (Hoechst), Vinnapas R dispersion powder (Wacker) or the like alone are used as the actual binders or in a mixture with Portland cement (special cements with high aluminate contents).
  • Styrofoam beads, cork particles, finely ground bentonite, very finely divided silica (Aerosil R ) and others are suitable as fillers or inert agents for damaging such leaks. To what extent the latter two materials also support the effect of the binders is currently. not yet clarified.
  • Expanded clay can be used as filling material if the leak is at or around the lowest point of the pipe to be repaired.
  • suction can also be carried out using lances (in the case of gas-impermeable leaks): from 6.13, a hose which has a thickening at the front is inserted up to the leak (or drawn in from the opposite side).
  • lances in the case of gas-impermeable leaks: from 6.13, a hose which has a thickening at the front is inserted up to the leak (or drawn in from the opposite side).
  • a wooden frame each about 1.8 m wide, 5.4 m long and 0.9 m high, was filled to about 0.2 m with a mixture of gravel and sand (grain sizes 0.5 - 8 mm).
  • An M-shaped coil of 1-inch gas tubes was placed on this bed.
  • the said pipe coil had four parallel strands. To artificially create pressure drop, they had -shaped connectors between the strands only 1/2 inch 0 ⁇ i . In the third strand (viewed in the flow direction) one or more 1 cm holes were drilled to the side.
  • the pipe coil had an ascending inlet and outlet pipe.
  • the wet dam mixture was stirred in a 160-1 barrel. Achieving sufficient homogeneity of the mixture was a problem.
  • liquid insulation mixtures consisting of 100 parts by weight of water, 10 parts by weight of rigid plastic foam particles of 2-4 mm and 1 part by weight of Aerosil R 90 were examined.
  • the mixing drum had a lower outlet with a shut-off valve.
  • a mobile centrifugal pump was connected to pump suspensions. With a delivery volume of around 50 l / min ( ⁇ 1 l / s), this delivered a ⁇ p of max. 2 bar overpressure.
  • the connecting line from the pump to the inlet line of the test facility was mobile (metal hose), had a quick connection (Bride) and was equipped with a relatively precise pressure gauge (range 1 - 3 bar, division 1/10 bar).
  • the outlet line from the test facility which led to an outlet with an upstream filter for the damping agent, had the same pressure gauge and a control valve to regulate the flow characteristics.
  • the man After connecting the centrifugal pump, the man adjusted the outlet pressure as closely as possible to 0.5 bar and the man on entering noted the pressure on his manometer every 10 seconds. It was found that whenever the hole was blocked or at least partially closed, the pressure indicator on manometer 1 (the man at manometer 2, as I said, looked at a constant overpressure of 0.5 bar as possible and also from the eye) the delivery volume was as constant as possible) by about 0.1 to 0.2 bar higher.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Pipe Accessories (AREA)
  • Sealing Material Composition (AREA)
  • Pipeline Systems (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Duct Arrangements (AREA)
  • Fertilizing (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP91912245A 1990-07-03 1991-06-27 Verfahren zum abdichten und innenausbessern von systemen verlegter leitungen Expired - Lifetime EP0489891B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH220690 1990-07-03
CH2206/90 1990-07-03
CH318890 1990-10-03
CH3188/90 1990-10-03
PCT/EP1991/001210 WO1992001191A1 (de) 1990-07-03 1991-06-27 Verfahren zum abdichten und innenausbessern von systemen verlegter leitungen sowie vorrichtungen

Publications (2)

Publication Number Publication Date
EP0489891A1 EP0489891A1 (de) 1992-06-17
EP0489891B1 true EP0489891B1 (de) 1994-09-07

Family

ID=25689793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91912245A Expired - Lifetime EP0489891B1 (de) 1990-07-03 1991-06-27 Verfahren zum abdichten und innenausbessern von systemen verlegter leitungen

Country Status (16)

Country Link
EP (1) EP0489891B1 (da)
JP (1) JPH05500925A (da)
KR (1) KR970009022B1 (da)
AT (1) ATE111200T1 (da)
AU (1) AU648321B2 (da)
BG (1) BG95994A (da)
BR (1) BR9105813A (da)
DE (1) DE59102835D1 (da)
DK (1) DK0489891T3 (da)
ES (1) ES2063514T3 (da)
FI (1) FI95963C (da)
HU (1) HUT60849A (da)
NO (1) NO920739L (da)
PL (1) PL167861B1 (da)
RU (1) RU2103590C1 (da)
WO (1) WO1992001191A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0721551T3 (da) * 1993-09-29 1998-05-04 Andreas Reimelt Fremgangsmåde til renovering af rørledninger
DE19701010A1 (de) * 1997-01-14 1998-07-16 Josef Stoeckl Verfahren zur Sanierung der Innenwände festverlegter Rohrleitungen
FR2801519A1 (fr) * 1999-11-25 2001-06-01 Claude Henri Strouk Plastification des parois internes des canalisations installees
RU2239747C1 (ru) * 2003-02-20 2004-11-10 Лобанов Федор Иванович Способ ремонта трубопроводов
RU2301937C2 (ru) * 2005-08-02 2007-06-27 Федеральное государственное унитарное предприятие "Производственное объединение "Маяк" Способ герметизации металлических водоохлаждаемых элементов трубопроводных конструкций термических установок переработки радиоактивных отходов

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727412A (en) * 1971-08-16 1973-04-17 Phillips Petroleum Co Process for the in situ sealing of soil surrounding underground conduit breaks
US4311409A (en) * 1979-08-29 1982-01-19 The United States Of America As Represented By The United States Department Of Energy Wet powder seal for gas containment
US4432798A (en) * 1980-12-16 1984-02-21 The Duriron Company, Inc. Aluminosilicate hydrogel bonded aggregate articles
DE3119360A1 (de) * 1981-05-15 1982-12-23 Manfred 2305 Heikendorf Schmidt Verfahren und vorrichtung zum erhoehen oder wiederherstellen der statischen festigkeit an schwachstellen, vorzugsweise an bruchstellen, von erdverlegten kanalrohrleitungen
GB2106009B (en) * 1981-09-21 1985-01-23 Osaka Gas Co Ltd Method of internally coating pipeline and sealant therefor
GB2140337B (en) * 1983-05-25 1986-12-03 Nihon Plant Service Centre Kab Cleaning and lining a pipe
GB2164070B (en) * 1984-09-05 1987-10-28 Tba Industrial Products Ltd Heat settable sealant material
CA1311912C (en) * 1987-07-09 1992-12-29 Werner Naf Method for the repair of the inside of installed conduits
CH674172A5 (da) * 1987-07-09 1990-05-15 Intertechno Ag
IT1228011B (it) * 1989-01-26 1991-05-23 Assotubi Ecologica Srl Procedimento ed attrezzatura per il rivestimento interno di tubazioni in calcestruzzo.

Also Published As

Publication number Publication date
PL294030A1 (en) 1992-10-19
FI95963C (fi) 1996-04-10
AU648321B2 (en) 1994-04-21
HUT60849A (en) 1992-10-28
KR970009022B1 (ko) 1997-06-03
ATE111200T1 (de) 1994-09-15
DK0489891T3 (da) 1995-02-13
AU8062191A (en) 1992-02-04
BG95994A (bg) 1993-12-24
PL167861B1 (pl) 1995-11-30
NO920739D0 (no) 1992-02-25
JPH05500925A (ja) 1993-02-25
BR9105813A (pt) 1992-08-18
HU9200554D0 (en) 1992-08-28
RU2103590C1 (ru) 1998-01-27
NO920739L (no) 1992-04-30
WO1992001191A1 (de) 1992-01-23
EP0489891A1 (de) 1992-06-17
FI95963B (fi) 1995-12-29
DE59102835D1 (de) 1994-10-13
FI920938A0 (fi) 1992-03-02
ES2063514T3 (es) 1995-01-01

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